diff mbox series

[v2,1/6] ice: ensure the copied buf is NUL terminated

Message ID 20240424-fix-oob-read-v2-1-f1f1b53a10f4@gmail.com (mailing list archive)
State Accepted
Headers show
Series Ensure the copied buf is NUL terminated | expand

Commit Message

Bui Quang Minh April 24, 2024, 2:44 p.m. UTC 
Currently, we allocate a count-sized kernel buffer and copy count bytes
from userspace to that buffer. Later, we use sscanf on this buffer but we
don't ensure that the string is terminated inside the buffer, this can lead
to OOB read when using sscanf. Fix this issue by using memdup_user_nul
instead of memdup_user.

Fixes: 96a9a9341cda ("ice: configure FW logging")
Fixes: 73671c3162c8 ("ice: enable FW logging")
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: Bui Quang Minh <minhquangbui99@gmail.com>
---
 drivers/net/ethernet/intel/ice/ice_debugfs.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/intel/ice/ice_debugfs.c b/drivers/net/ethernet/intel/ice/ice_debugfs.c
index d252d98218d0..9fc0fd95a13d 100644
--- a/drivers/net/ethernet/intel/ice/ice_debugfs.c
+++ b/drivers/net/ethernet/intel/ice/ice_debugfs.c
@@ -171,7 +171,7 @@  ice_debugfs_module_write(struct file *filp, const char __user *buf,
 	if (*ppos != 0 || count > 8)
 		return -EINVAL;
 
-	cmd_buf = memdup_user(buf, count);
+	cmd_buf = memdup_user_nul(buf, count);
 	if (IS_ERR(cmd_buf))
 		return PTR_ERR(cmd_buf);
 
@@ -257,7 +257,7 @@  ice_debugfs_nr_messages_write(struct file *filp, const char __user *buf,
 	if (*ppos != 0 || count > 4)
 		return -EINVAL;
 
-	cmd_buf = memdup_user(buf, count);
+	cmd_buf = memdup_user_nul(buf, count);
 	if (IS_ERR(cmd_buf))
 		return PTR_ERR(cmd_buf);
 
@@ -332,7 +332,7 @@  ice_debugfs_enable_write(struct file *filp, const char __user *buf,
 	if (*ppos != 0 || count > 2)
 		return -EINVAL;
 
-	cmd_buf = memdup_user(buf, count);
+	cmd_buf = memdup_user_nul(buf, count);
 	if (IS_ERR(cmd_buf))
 		return PTR_ERR(cmd_buf);
 
@@ -428,7 +428,7 @@  ice_debugfs_log_size_write(struct file *filp, const char __user *buf,
 	if (*ppos != 0 || count > 5)
 		return -EINVAL;
 
-	cmd_buf = memdup_user(buf, count);
+	cmd_buf = memdup_user_nul(buf, count);
 	if (IS_ERR(cmd_buf))
 		return PTR_ERR(cmd_buf);